Planning guidelines PR-NIS of the city of Zurich
The city of Zurich wants to treat all building technical basic installations of city-owned buildings, regarding their electromagnetic pollution according to standardized guidelines, to ensure the same conditions for all users.
The “
Planning guidelines non-ionising radiation PR-NIS" lanungsrichtlinie Nichtionisierende Strahlung PR-NIS” were created for this reason. Users and operators receive an electromagnetically immission-low indoor climate in rooms, where people stay for a longer period of time, on a regular basis. For people who may be classified as particularly sensitive (e.g. children and people in need of special care), an increased protection against non-ionising radiation is sought. The PR-NIS sets no special requirements regarding the radiation limits of mobile devices (PC, printer, mobile phones).
PR-NIS limit values of the city of Zurich
Limit values of the city of Zurich in comparison with the limit values of the NISV on the example of the immissions at 50Hz.
House installations |
transformer installations |
NZB (PR-NIS) |
NZA (PR-NIS) |
OMEN (NISV) |
Not sensitive use (NISV / PR-NIS) |
>4h / Day or >800h / Year |
>4h / Day or >800h / Year |
>4h / Day or >800h / Year |
<4h / Day or <800h / Year |
GNZB |
GNZA |
AGW |
IGW |
1µT 500V/m
|
0.4µT 50V/m |
1µT 5kV/m |
100µT 5kV/m |
Limit values according to usage
Category |
Use |
SIA 2024 |
NZB GNZB |
NZA GNZA |
Notes |
General |
Sales area (corridor, entrance) |
X |
|
|
to all categories |
|
Side room (Stock, Technique, Archive) |
X |
|
|
to all categories |
|
Toilet, bath, shower |
X |
|
|
to all categories |
|
warehouse, shipping |
X |
X |
|
only personal workspace |
|
Parking garage (public, private) |
X |
|
|
|
|
Lavatory and drying room |
X |
|
|
|
|
Children playgrounds |
|
|
X |
|
|
Server room |
X |
|
|
|
|
Building plot |
|
X |
|
on which sensitive use approved |
Live |
Living space, bedroom |
X |
|
X |
|
|
Kitchen |
X |
X |
|
|
|
Home office, crafting room |
|
X |
|
|
Administration |
Single and group offices |
X |
X |
|
to all categories |
|
Open-plan office |
X |
X |
|
to all categories |
|
Conference room |
X |
X |
|
to all categories |
|
Main hall, reception |
X |
X |
|
only personal workspace |
School and sport building |
Schoolroom |
|
|
X |
|
|
Nursery |
|
|
X |
|
|
Teacher's lounge |
X |
X |
|
|
|
Library |
X |
X |
|
|
|
Lecture room |
X |
X |
|
|
|
Special rooms (physics, and chemistry rooms, school kitchen) |
X |
X |
|
|
|
Gym, sports hall |
X |
X |
|
|
|
Fitness room |
X |
X |
|
|
|
Indoor swimming pool |
X |
X |
|
|
|
Cloackroom, showers |
X |
|
|
|
Meeting places
|
Theater, cinema |
X |
|
|
|
|
Multi-purpose hall |
X |
|
|
|
|
Exhibition hall |
X |
|
|
|
Hospital, care home |
Bedrooms |
X |
|
X |
|
|
Nurse station |
X |
X |
|
|
|
Practice treatment rooms |
X |
X |
|
|
Reastaurant |
Restaurant |
X |
|
|
|
|
Cafeteria |
X |
X |
|
only personal workspace |
|
Kitchen of the restaurant |
X |
X |
|
|
|
Kitchen of the cafeteria |
X |
X |
|
|
|
Cold storage room |
X |
|
|
|
Hotel |
Hotelroom |
X |
X |
|
|
|
Reception, lobby |
X |
|
|
|
Industry |
Production (rough work) |
X |
|
|
according to SUVA |
|
Production (fine work) |
X |
|
|
according SUVA |
Sales |
Furniture |
X |
|
|
|
|
Food |
X |
|
|
|
|
Construction and garden |
X |
|
|
|
|
Supermarktet (Food/Nonfood) |
X |
|
|
|
|
Specialist retail, store |
X |
|
|
|
|
Jeweler |
X |
|
|
|
|
Collector area |
|
X |
|
|
Limit values for fields
Limit values for low-frequency and high-frequency fields
Frequency |
Limit values use zone B (GNZB) of Zürich city |
Limit values use zone A (GNZA) of Zürich city |
|
Electric field strength [V/m] |
Magnetic flux density [µT] |
Electric field strength [V/m] |
Magnetic flux density [µT] |
1 Hz |
1'000 |
0.4 |
100 |
100 |
25 Hz |
1'000 |
0.4 |
100 |
100 |
50 Hz |
500 |
0.4 |
50 |
50 |
2.5 kHz |
10 |
0.4 |
1 |
1 |
1 MHz |
10 |
0.4 |
1 |
1 |
10 MHz |
3 |
0.01 |
0.3 |
0.3 |
400 MHz |
3 |
--- |
0.3 |
0.3 |
2 GHz |
6 |
--- |
0.6 |
0.6 |
300 GHz |
6 |
--- |
0.6 |
0.6 |
What are the key issues?
- Keep distribution sites and raised zones as far as possible away from quite zones
- Course of main lines and trays
- Concept grounding systems
- Feed lines from distribution panels are to be arranged as a star if possible
- Shielded cables for permanent consumers
- Place power outlets so that only short connection cables are sufficient
- Place lines so that quiet zones are not affected
Possible shielding solutions for climbing zone